swarm-controller: document every try-out status and row shape in the OpenAPI

The routes' annotations now list every 400 reason (including the JSON
shape rejections), the 503 causes, the 31-minute running window, the
404 after a controller restart, and that an errored row reads
not-applicable with certainty 0 and an empty reason, so the page keys
off error, and that overall can be approve beside errored rows.

swarm-queue-client/src/review_classifier.rs

@@ -109,7 +109,10 @@ pub struct Row {
     /// polarity. `false` for every row that is not counted.
     pub passed: bool,
     pub reason: String,
-    /// Why this classification has no answer. Such a row is never counted.
+    /// Why this classification has no answer: a runtime error, a timeout, or
+    /// an answer that did not validate. Such a row reads `not-applicable`,
+    /// certainty 0 and an empty reason, and is never counted; key off this
+    /// field, not off the verdict.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<String>,
 }